Portion of a shoe outsole



FIG. 1 is a first perspective view of a portion of a shoe outsole showing my new design;

FIG. 2 is a bottom view thereof; and,

FIG. 3 is a second perspective view thereof.

The broken line immediately adjacent to the front of the shaded area represents an unclaimed boundary of the design. The broken line showing of the generally three-sided element within the shaded area, and the unshaded area within its generally three-sided boundary are for illustrative purposes only and forms no part of the claimed design. The broken line showing of the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe outsole, as shown and described. 